Need a new power brick for your device? This is a replacement AC/DC adapter designed to work with CUI Inc power supply models ETSA120500UD and ETSA120500UDC-P5P-SZ. It's a switch-mode power supply that converts your wall outlet's AC power to the DC power your equipment needs. It's listed as a \travel\ adapter, which often means it might have a compact design or interchangeable plugs, but you should confirm the specific output specs (voltage and amperage) and connector type match your original CUI adapter exactly before buying. Using an incorrect adapter can damage your device. This is an aftermarket accessory from Accessory USA. If your original CUI power supply died, this is an affordable way to get your monitor, speaker, or other electronics up and running again. Always verify compatibility!